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(No Model.) 2 Sheets-Sheet 1.

s. H. TARBELL & G. SOUTHER.

PILE DRIVER.

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UNITED STATES PATENT OFFICE. I

STEPHEN HQTARBELL AND GEORGE SOUTHER, OF osrou, MASS.

PILE-D'RIVER.

SPECIFICATION forming part of Letters Patent No. 258,954, dated June 6", .1882. Application filed December 31, 1880. Renewed January 9, 1882.- (No model.)

To all whom it may concern:

Be it known that we, STEPHEN H. TARBELL and GEORGE SOUTHEE, both citizens of the United States, both residing at Boston, in the county of Sufl'olk and State of Massachusetts,

have jointly invented certain new and useful Improvements in Steam Pile-Drivers and we do hereby declarethe following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification. V

This invention relates to improvements in steam pile-drivers, and is especially designed for driving sheets or planks by steam-power, and to accomplish this purpose in a more rapid and labor-saving manner than formerly.

The invention is mainly composed of a steammotor with its cylinder and piston-rod, the latter havinga hammer secured to its lower end, which hammer in its fall strikes on a shoe resting on the sheet or pile or plank, said shoe and cylinder being connected in such a manner that the said steam-motor and its pistonrod and hammer, as Well as the shoe on the top of the pile or plank or sheet, all descend and follow the latter in the ratio in which such pile, plank, or sheet is being driven, as will be more fully described, reference being had to the accompanying drawings, on which- Figure 1 represents an end elevation, and Fig. 2 represents a longitudinal section. Fig. 3 represents a cross-section of the valve or cutoff at the lower end of the steam-cylinder.

a is a suitable platform for the support of the steam-boiler b and the upright frame a 0. Between said frame 0 c is the slide (1, free to move up and down, and to prevent the latter from moving out from the frame 0 c it is provided with suitable guide-pieces, d d, as shown.

6 is a single-acting steam-cylinder, having brackets f f firmly secured to the movable slide d.

g is the piston within the cylinder 6, which piston is preferably made in one piece with the piston-rod y g, of which 9 is the upper portion, and g is the lower one, as shown.

g.is a head in the lower end of the pistonrod g", which head is also preferably made in one single piece with the piston-rod 9, so as to prevent its being detached from said pistonrod during the operation of the machine. The head 9' is located in a T-shaped groove, 72/, in the upper part of the up-and-down movable hammer or weight h, thelatter being arranged to slide up and down on the guide-rods it, that are secured in their upper ends to the bracket f, as shown.

Bis a wooden block, inserted in the under side of the hammer h to prevent the latter from strikingon the metallic shoe l, that rests loosely upon the top of the sheet or pile L that is being driven. The said shoe lis loosely attached to the lower ends of the vertical guide-rods it, as

shown, the latter being provided with collars or projections t" i above the shoe 1, by means of which the cylinder 0 is supported on the shoe l during the upward motion of the piston g and its hammer h, as well as during the fall of the latter, so that the cylinder e, its rods '5 i, and'the shoe lare supported on the top of the pile that is being driven, and gradually descend in the same ratio.

m is a flexible steam-pipe, leading from the valve n on the boiler to the valve-box 0 on the steam-cylinder. Vithin the valve-box o is located a valveor cut-ofl', 0, of which 10 is the valve-spindle, to which the short lever p is attached.

q is a connecting-rod from the lever 12 to the upper lever, 1', that is movable on the fulcrum s, as shown.

r r" are projections from the upper lover, a, that are acted upon by the inclines it on the piston-rod g during the up-and-down motion of the latter, so as to automatically'change the position of the valve 0', that is attached to the spindle 10, so as to deliver and cut oft the steam from the lower end of the steam-cylinder.

During the operation of the machine the steam is delivered to thelower end of the steamcylinder, by which the piston yis raised, as is also the hammer h, that is allowed to fall by its own gravity as soon as the piston'g reaches its highest altitude, at which point the steam is automatically cut ofl". In this manner, by alternately raisin gthe hammer by steam-power and allowing it to descend by its own gravity upon the shoe 1, interposed between it and the sheet or pile, the latter is rapidly being driven In combination with the gradually-descendinto the desired place. It will thus be seen ingsteam cylindere andits hammer h, theshoe that the slide d, the steam-cylinder 0, and the l, resting loosely on the top of the pile, as and 15 hammer h descend gradually in the ratio as for the purpose set forth and described.

5 the sheet or pile is being driven. u is a snit- In testimony whereof we have affixed our able Windlass, with a rope, *0, leading over the signatures in presence of two witnesses. pulley w to the steam-cylinder e, for the purpose of raising the latter to its proper position for driving another sheet, plank, or pile. 10 Having thus fully described the nature, con- Witnesses:

struction, and operation of our invention, we ALBAN ANDRlJN, 1

Wish to secure by Letters Patent and claim- HENRY CHADBOURN. 

